A Simple Chemical Procedure for Direct Synthesis of NiO on Nickel Foam Electrode Applied in Non-enzymatic Glucose Electrochemical Measurements

Abstract

It is well-known that the amount of glucose in the blood that exceeds the normal sugar blood range can cause diabetes, which is one of the most dangerous diseases that thread human health. Amongst a lot of methods that have been developed to measure glucose levels, electrochemical glucose sensors have attracted more attention due to their accuracy and efficiency. In our work, a simple, instant, and economical chemical process was conducted to deposit NiO nanostructures on the surface of a nickel foam electrode for non-enzymatic glucose electrochemical sensor. The morphologies and components of synthesised materials were characterised by field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. Cyclic voltammetry and chronoamperometry were used to measure glucose concentration based on the synthesised materials. The electrode showed a remarkably high sensitivity of 6.8 mA·mM−1·cm−2 and a low limit of detection of 5.7 µM. The results indicated that the fabricated electrode can be a potential candidate for clinical applications.